WASHINGTON (WUSA) -- DC Council Member Phil Graham is holding off on calling for Mayor Vincent Gray to resign amid legal troubles over his 2010 campaign, according to the Washington Post on Tuesday morning. Three members of DC Council have called for the mayor to resign.

An immunity deal could be in the works for Vernon Hawkins. Investigators believe he served as the field operations manager for that alleged shadow campaign.

Sources tell 9News Now's Bruce Johnson that Hawkins played a key role in funding the Vincent Gray's 2010 mayoral bid. Sources tell Johnson prosecutors are also prepared to offer Hawkins immunity for his co-operation.